It's not gross at all, it's totally normal. And funnily enough I've wondered the same thing myself sometimes. But to put it another way, what comes up, must come down! Just hopefully enough stays up!

You probably do do this already, but what I do is place a pillow under my hips at the start, so that you are slightly tilted back, then when we're finished I make DH leaves very gently and then I stay there for about half an hour. They do say it's not necessary, but I prefer to. But there is always leakage afterwards.